将View兑换Bitmap

	/**
	 * 中间View保罗转化成Bitmap
	 *
	 */
	private Bitmap saveViewBitmap(View view) {
		// get current view bitmap
		view.setDrawingCacheEnabled(true);
		view.buildDrawingCache(true);
		Bitmap bitmap = view.getDrawingCache(true);

		Bitmap bmp = duplicateBitmap(bitmap);
		if (bitmap != null && !bitmap.isRecycled()) {
			bitmap.recycle();
			bitmap = null;
		}
		// clear the cache
		view.setDrawingCacheEnabled(false);

		return bmp;
	}

	public static Bitmap duplicateBitmap(Bitmap bmpSrc) {
		if (null == bmpSrc) {
			return null;
		}

		int bmpSrcWidth = bmpSrc.getWidth();
		int bmpSrcHeight = bmpSrc.getHeight();

		Bitmap bmpDest = Bitmap.createBitmap(bmpSrcWidth, bmpSrcHeight,
				Config.ARGB_8888);
		if (null != bmpDest) {
			Canvas canvas = new Canvas(bmpDest);
			final Rect rect = new Rect(0, 0, bmpSrcWidth, bmpSrcHeight);

			canvas.drawBitmap(bmpSrc, rect, rect, null);
		}

		return bmpDest;
	}